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Excell Corporation

USPTO Granted Patents = 23

% Expired Patents = 13.0

EPO Patents = 4

Trademarks = 3

Forward Citations = 180

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12 inventors (with patents filed for the assignee):

Tatsuya Nakagawa (16 out of 16 patents)

Yasuo Ezaki (12 out of 12 patents)

Shoji Shimizu (3 out of 3 patents)

4. Takashi Tamura (2 out of 52 patents)

5. Masahiro Kimura (1 out of 100 patents)

6. Takahiro Onishi (1 out of 1 patent)

7. Kuniharu Tobe (1 out of 3 patents)

8. Katsunobu Nishida (1 out of 1 patent)

9. Nobumasa Tatara (1 out of 1 patent)

10. Tatsuhiko Mukawa (1 out of 4 patents)

11. Thomas Christopher Rumler (1 out of 2 patents)

12. Hiroo Kawano (1 out of 3 patents)

13. Takahiro Onishi (0 patent)

23 patents: Sort by Forward Citations

1. 12140199 - Dust cover, suspension device, and method for manufacturing dust cover (2024-11-12),

2. 10221757 - Intake joint structure for turbocharger (2019-03-05),

3. 9822740 - Air intake duct and method for producing same (2017-11-21),

4. 9358718 - Shielding structure of a through-hole formed in a wall of a plastic hollow product (2016-06-07),

5. 7678324 - Method for forming a hollow plastic product (2010-03-16),

6. 7316427 - Hollow plastic product having a connector pipe (2008-01-08),

7. 6537484 - Method for manufacturing a multi-layer plastic pipe (2003-03-25),

8. 6319454 - Method and apparatus for manufacturing a hollow plastic product (2001-11-20),

9. 6251332 - Method for manufacturing a multilayer plastic pipe (2001-06-26),

10. 6119731 - Hollow plastic product (2000-09-19),

11. 5851456 - Method for manufacturing a multi-layer plastic product (1998-12-22),

12. 5723828 - Hollow plastic product having a sound attenuator (1998-03-03),

13. 5720525 - Vehicle seat with anti-rattle arm rest (1998-02-24),

14. 5699835 - Multi-layer plastic hollow pipe (1997-12-23),

15. 5653265 - Hollow plastic product (1997-08-05),

Excell Corporation, headquartered in Matsudo, Japan, specializes in the development and manufacturing of advanced electronic components and systems. The company focuses on innovative solutions in the fields of telecommunications, automotive electronics, and industrial automation. With a commitment to research and development, Excell aims to enhance connectivity and efficiency across various sectors, contributing to the advancement of technology in both domestic and international markets.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

23 Patents

#1 in Matsudo

#2,702 in Japan

#27,649 in the World

Excell Corporation

Forward Citations = 180

12 inventors:

Tatsuya Nakagawa (16 out of 16 patents)

Yasuo Ezaki (12 out of 12 patents)

Shoji Shimizu (3 out of 3 patents)

4. Takashi Tamura (2 out of 52 patents)

5. Masahiro Kimura (1 out of 100 patents)

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